<template>
  <div>
    <div class="search">
      <input class="search-input" type="text" placeholder="输入城市名或拼音" v-model="keyword">
    </div>
    <div class="search-content" ref="search" v-show="this.keyword">
      <ul>
        <li class="search-item border-bottom" v-for="item in list" :key="item.id" 
        @click="handleCityClick(item.name)">{{item.name}}</li>
        <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
      </ul>
    </div>
  </div>
</template>

<script>

import Bscroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'

export default {
  name:'CitySearch',
  props:{
    cities: Object,
  },
  data(){
    return{
      keyword:'',
      list:[],
      timer:null
    }
  },
  computed:{
    hasNoData(){
      return this.keyword  && !this.list.length
    }
  },
  methods:{
    handleCityClick(city){
      this.changeCity(city)
      this.$router.push('/')      
    },
    ...mapMutations(['changeCity'])
  },
  watch:{
    keyword(){
      if(this.keyword){
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((item) => {
            if (item.spell.indexOf(this.keyword) > -1 || item.name.indexOf(this.keyword) > -1){
              result.push(item)
            }
          });
        }
        this.list = result;
      },1)
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.scroll = new Bscroll(this.$refs.search, {})
    })
  },
}
</script>

<style lang="stylus" scoped>
@import '~@/assets/styles/varibles.styl'
  .search
    height :.72rem
    padding :0 .1rem
    background $bgColoer
    .search-input
      box-sizing :border-box
      width :100%
      height .62rem
      padding :0 .1rem
      line-height :.62rem
      text-align :center
      border-radius :.07rem
      color :#666 
  .search-content
    z-index :1
    overflow :hidden
    position :absolute
    top :1.58rem
    left :0
    right :0
    bottom :0   
    background :#eee
    .search-item
      line-height :.62rem
      padding-left :.2rem
      background :#fff
      color :#666
</style>
